45121261 has 4 divisors (see below), whose sum is σ = 45136000. Its totient is φ = 45106524.

The previous prime is 45121259. The next prime is 45121291. The reversal of 45121261 is 16212154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45121261 - 2¹ = 45121259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45121201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (11284000).

Almost surely, 2^45121261 is an apocalyptic number.

It is an amenable number.

45121261 is a deficient number, since it is larger than the sum of its proper divisors (14739).

45121261 is a wasteful number, since it uses less digits than its factorization.

45121261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14738.

The product of its digits is 480, while the sum is 22.

The square root of 45121261 is about 6717.2361131644. The cubic root of 45121261 is about 356.0085345974.

It can be divided in two parts, 451 and 21261, that added together give a palindrome (21712).

The spelling of 45121261 in words is "forty-five million, one hundred twenty-one thousand, two hundred sixty-one".